Sodium-cyanid briquet.



A. KAUFMAN.

SODIUM CYANID BRIQUET.

APPLICAHON men NOV-7.1916.

1,262,057. Patented Apr. 9,1918.

'and it also relates to metho UNITED STATES PATENT OFFICE.

FORGE KAUFMAN, OF NEW YORK, N. Y., ASSIGNOB, BY MESNE ASSIGNMENTS, TO AIR REDUCTION COMPANY, INCORPORATED, A CORPORATION OF NEW YORK.

BODIUM-GYANID BRIQUET.

ipceiflcatiou of Letters Patent.

Patented Apr. 9, 1918.

Application filed November I, 1910. Serial No. 180,090.

To all whom it may concern:

Be it known that I, ALFONSE KAUFMAN, a citizen of the United States, residing at New York in the county of New York and State of lllew York, have invented certain new and, useful 1m 'rovements in Sodium- Oyanid Briquets 0 which the following is I. full, clear, an exact description, such as will enable others skilled'in the art to which it 5p! crtains to make and use the same.

a invention relates to articles of manufacture composed of loose or granular material put up 1n the form of briguets, orblocks,

s of manufacturing such bri uets, or blocks, from loose material, and as particular relation to methods andbriquets, or blocks, involving a tgnamd composition, as sodium cyanid.

e of the obglects of the invention is to rovide a e ani composition, such as so- 'um 0 ani in a condition suitable for convenien transportation, manipulation, and

marketin erallf', which condition will be such a. it wil not be materially deleteriously a by exposure to the atmosphere, an yet wil be such that it may be efliciently directly utilized in its chemical relations.

Another object of the invention is the provision of an eliicient method of formin cyanid briquets havin the features of uti ity just mentioned on others which will be up arent fromv the following description.

er objects will be in part obvious and in pointed out hereinafter.

be invention accordingly consists in the several steps and the re ation and order of one or more of such steps with relation to each of the'others thereof, and in the features of, construction, combinations of elements and. arrangement of parts, which will to exam liiied in the process hereinafter, discl and the construction hereinafter set forth, and the sec e of the ap lication of each of which wilFbe indicate in the following claims.

In the accompanying drawing forming part of thisspecilicatlon, wherein similar reference charactcrsrefer to similar parts throughout the several views- 4 Figure 1 iso diagrammatic illustration of an apparatus by means of which certain pas-Its of the method maybe carried out; an

' Fig. 2 is a sectional view of a briquet or block.

One of the important requirements of sodium cyanid is t at it shall be in a condition to be readily soluble, and one of the im' portant' objects of the present invention is to provide a sodium cyanid bri not which shal be readily soluble to an e oient degree, and yet be rotected from being rapidly afi'ected by t e moisture in the atmosphere, and from rapid decomposition of the cyanid by the CO sin tne air.

Referring to the specific briquet, or block, herein disclosed, it is composed wholly of sodium cyanid, althou h it might be composed of other cyani s, or cyanid mixed with other substances. In forming the bri uet, first, loose, granular or powdered sodium cyanid is compressed into briquet form, the inner portion of the briquct retaining its original generally granular, though more compact condition so as to be uite porous, and therefore readily soluble.

he outer surface of the briquet is provided with a coat more dense than the inner mass, and which is consequently less rapidly soluble than the inner portion or mass of the briquet, and is also less rapidly absorbent than the inner mass. This outer coat or coating may be more practicall obtained as a second step in the roocss y subjecting. the briquet to a su cient tern erature the inner mass of the briquet, but only long enough to fuse the outer surface and so that the inner mass will remain unfused. Viewed in one aspect, one of the requirements of the invention will be attained on account of the less porosity of the fused outer surface as compared with that of the inner mass. This coating prevents rapid absorption of moisture and also re id decomposition of the cyanid b the O in the air, and may be made 0 such thinness as not to seriously lessen'rapidity of solubilit of the briquet as a whole when compare to the rate of solubility of the porous portion urnace chamber,

' chginiber of the furnace which will thereof. In the drawing, the numeral 1 indicates the inner porous portion of a briqnet, and the numeral 2 the outer fused coating thereon, the illustration being diagrammatic.

Comporting with the general advantages of the invention, when the briquet is of such a size as to make it oesirab le to utilize only a portion thereof, or to utilize the briquet in a broken form of ascertained weight or size. the opposite faces of the briquet are provided with weakening indentures, or

moves, 3, which may be embodied in the riquet during' the compression of the material thereof into briquet; form by the first step of the process. In order that the whole outer surface of the briquet, may be {no vidcd with the coating referred to it' conduces to efliciency to simultaneously freely expose the entireouter surface. as far as possible. to the fusing, temperature, and to this end one or more faces of the briquet is provided with supporting ribs or projections 4, each of the supporting faces of these ribs or projections be ng of small area as compared with the full area of' the outer surface of the briquet.

In Fig. 1 of the drawing is shown :1 diagrammatic section of a practical form of furnace, by means of which the outer coating of the briquet may be attained. The numeral 5 indicates supports for a cast iron plate 6 on which is erected afire brick furnace 7 having,' a vent 8 and gas burners 9.

he numeral 10 indicates then-mite slag.

against which the flame of tin-burners 9 are directed. and 11 indicates guides or supports, one inside and the other outside the for guiding and supportmg an endless carrier or conveyor 12, this conveyor being adapted to support the hriquets l3 ,and carry them throu h the at: a

cientlv high temperature to fuse the outer 'sur ace of thobriquets and form the eoatingheminbefom referred to. The conveycrs are provided withnibs or tracks, preferably aving ln ife edges, and v 5 of. the briquets me upon the nibs, 14 so that the under; s'uafaces of the hriqaets are supported abovethe surface of the endless carrier whe'rehythesaid under surfaces, .as welhhs the upper-and lateral surfaces, a e freelyexposed to the temperature conditions ini the' "farnace'chamh'er.

The powdered material may be manufactured in o briquet form in any snita lo compressor, as for instance, in ahvdraulic press, tlie'dio and laten of which press are designed to give t to desired form and size. to the b'riquet as'well as to provide the indenturejs 3, and the sup ortingqibs 4. From the foregoing it wil b'e apparent that the objects hereinbefore referred to, among others, will be etiiciently attained.

dill'erent embodiments 0 the ribs with a coat of used As many changes could be made in carryillg out the above process, and in the above construction. and many tnparently widely f this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the language used in the following claims is intended to cover all of the generic and specific features of the invention herein described and all statements of the scope of the in vention, which, as a matter of language, might be said to fall therebctn'cen.

Having described my invention, what I and desire to secure by Letters claim as new Patent is:

1. A briquet of a cyanid composition having an inner portion and an outer coating, both being of the same chemical composition, but said outer coating being less rapidly soluble than the inner portion.

2. A briquet of a cyanid composition having an inner portion and an outer coating, both being of the same chemical composition, but said outer coating being less a sol-bent than the inner portion.

3. A briquct of sodium cyanid, com rising an inner portion of compressed so ium cyanid having an fused sodium cyanid.

4.. A briquet of sodium eyanid, com risinganinner portion of compressed eyanidhaving an outer surface of previously fuscd'sodium cyanid, said briquets having briquet sup ortin ribs on one face, the supporting aces o w area as com ared with the full area of said faces of.the ri uet. i

5. A briquet aiving an, inner porous comosition and an outer fused surace of less porosity it inner mass, said outer surface havingthe' same chemiium.

said ribs being of small.

outer surface of previously 6. The method ofnianu eturing hriquets which comprises COMIiIQSSlIIg a composition includinge anid into nquet form, and rovidihg aai bri not within coat of the-same material which 1683 rapidly adected byais and moisture than the inner mass 0 n briquet.

7.11m method of manufacturin briquets i which comprises eompressingaodiam cya'nid into briqhgt form, an provi 1 with !a co t osllodilm agiid-of a 30 tenc es in 1 a a an moisture than th inher mass ofytlirbri not.

8. The method of manufacturing rtquets which comprises com q isin sodium ey'anid into briquet for an provi in; said briquet um cyanid. 9. The method of autumn briqueta nat l'id bri not which comprises com ressing powdered aofnceof the same but not long enough to fuse 1 dium cyamd into a b ock, fusmg theouter surface of said block, and maintaining the inner mass unfused.

10. The method of manufacturing briquets, which comprises compressing powdered sodium cyanid into a block and subjecting the same to a temperature at a sufficlent height and for sufficient time to fuse the outer surthe mner mass.

In testimony whereof I afilx my signature in the presence of two Witnesses.

ALFONSE KAUFMAN. 

